18166065 has 16 divisors (see below), whose sum is σ = 29230656. Its totient is φ = 9633600.

The previous prime is 18166061. The next prime is 18166069. The reversal of 18166065 is 56066181.

It is an interprime number because it is at equal distance from previous prime (18166061) and next prime (18166069).

It is not a de Polignac number, because 18166065 - 2² = 18166061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18166061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631 + ... + 6060.

It is an arithmetic number, because the mean of its divisors is an integer number (1826916).

Almost surely, 2^18166065 is an apocalyptic number.

18166065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18166065 is a deficient number, since it is larger than the sum of its proper divisors (11064591).

18166065 is a wasteful number, since it uses less digits than its factorization.

18166065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6880.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 18166065 is about 4262.1667025118. The cubic root of 18166065 is about 262.8776243014.

The spelling of 18166065 in words is "eighteen million, one hundred sixty-six thousand, sixty-five".